How Many Moles Of Neon Occupy A Volume Of 14.3L At Stp?

1 mole of Ne =22.4 L at STP
conversion factors:
14.3L x 1 mol Ne/22.4L = 0.638

Or Ideal Gas law
V=14.32 @ STP  T=273K     p=1 atm
pv=nRT     n=pv/rt= 1atm x 14.3L/0.0821 atmL/Kmol x 273K = 0.638